Bake: remove derived mesh for bake API

Multires baking still uses DerivedMesh.

1 files changed, 22 insertions, 0 deletions

diff --git a/source/blender/blenkernel/intern/mesh_tangent.c b/source/blender/blenkernel/intern/mesh_tangent.c
index 9d6d0b90959..b8d260e6922 100644
--- a/source/blender/blenkernel/intern/mesh_tangent.c
+++ b/source/blender/blenkernel/intern/mesh_tangent.c
@@ -691,4 +691,26 @@ void BKE_mesh_calc_loop_tangent_ex(
 	}
 }
 
+void BKE_mesh_calc_loop_tangents(
+        Mesh *me_eval, bool calc_active_tangent,
+        const char (*tangent_names)[MAX_NAME], int tangent_names_len)
+{
+	/* TODO(campbell): store in Mesh.runtime to avoid recalculation. */
+	short tangent_mask = 0;
+	BKE_mesh_calc_loop_tangent_ex(
+	        me_eval->mvert,
+	        me_eval->mpoly, (uint)me_eval->totpoly,
+	        me_eval->mloop,
+	        me_eval->runtime.looptris.array, (uint)me_eval->runtime.looptris.len,
+	        &me_eval->ldata,
+	        calc_active_tangent,
+	        tangent_names, tangent_names_len,
+	        CustomData_get_layer(&me_eval->pdata, CD_NORMAL),
+	        CustomData_get_layer(&me_eval->ldata, CD_NORMAL),
+	        CustomData_get_layer(&me_eval->vdata, CD_ORCO),  /* may be NULL */
+	        /* result */
+	        &me_eval->ldata, (uint)me_eval->totloop,
+	        &tangent_mask);
+}
+
 /** \} */